Thanks, but my Hethkit have other schematic.
Mine is the AG-9A, but the circuit use 12AX7 tube !!!

Aldovan

mashaffer

15th November 2008 02:47 AM

You mean that one of the tubes (or both) in that schematic have been replaced with 12AX7? Hmm.... strange. The circuit is pretty simple you should be able to trace out the schematic yourself. You may have to as a google of that model number with 12AX7 reveals nothing.

anatech

15th November 2008 04:03 AM

Hi Mike,

Quote:

You mean that one of the tubes (or both) in that schematic have been replaced with 12AX7? Hmm.... strange.

I'll say! The unit used pentodes and subbing in triodes is really weird. I've only ever seen small changes in the manual, never anything as fundamental as this appears to be.

Hi Aldovan,
Does this unit appear to have been worked on at all? I'm wondering if it wasn't modified by someone. If the serial number is very low, it might be one of the first ones made. Always a possibility.